text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  // <valarray>
  
  // template<class T> class valarray;
  
  // template<class T>
  //   valarray<T>
  //   sqrt(const valarray<T>& x);
  
  #include <valarray>
  #include <cassert>
  #include <cstddef>
  
  #include "test_macros.h"
  #include "valarray_helper.h"
  
  int main(int, char**)
  {
      {
          typedef double T;
          T a1[] = {.5, .75, 1, 3, 7};
          T a3[] = {7.0710678118654757e-01,
                    8.6602540378443860e-01,
                    1.0000000000000000e+00,
                    1.7320508075688772e+00,
                    2.6457513110645907e+00};
          const unsigned N = sizeof(a1)/sizeof(a1[0]);
          std::valarray<T> v1(a1, N);
          std::valarray<T> v3 = sqrt(v1);
          assert(v3.size() == v1.size());
          for (std::size_t i = 0; i < v3.size(); ++i)
              assert(is_about(v3[i], a3[i], 10));
      }
  
    return 0;
  }
  